TY JOUR TI Preparation of tetraethoxysilane for the production of monodisperse spherical silica particles. Part 3. Influence of impurity elements KW monodisperse spherical silica particles KW supramolecular structures KW physicochemical methods of analysis JO Vestnik of geosciences AU Kamashev, D.V. PY 2024 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"